Apply the product rule:
; to find :
Apply the power rule: goes to
; to find :
Let .
The derivative of cosine is negative sine:
Then, apply the chain rule. Multiply by :
The derivative of a constant times a function is the constant times the derivative of the function.
Apply the power rule: goes to
So, the result is:
The result of the chain rule is:
The result is:
Now simplify:
The answer is:
4 3 - 2*x *sin(2*x) + 4*x *cos(2*x)
2 / 2 \ 4*x *\3*cos(2*x) - x *cos(2*x) - 4*x*sin(2*x)/
/ 3 2 \ 8*x*\3*cos(2*x) + x *sin(2*x) - 9*x*sin(2*x) - 6*x *cos(2*x)/